Stop mechanism



Feb. 21, 1928. 1,660,066

' S. A. NEIDICH STOE MECHANISM Filed June 50. 1926 1 7 FIG].

lA/VE/VTOR:

JAM/1. l1. A/E/p/CH,

Patented Feb. 21, 1928.

UNITED STATES PATENT OFFICE.

' SAMUEL .A. NEIDICH, OF EDGEWATEB PARK, .NEW JERSEY.

STOP MECHANISM.

Application filed June 30, ,1926. Serial No.'119 ,590.

to said idle pulley; said bar also carrying a brake, including .a friction shoe which, contemporaneously with the shifting of the belt, is pressed against the-tight -pulley from which the belt is shifted, to stop the rotation thereof and thus stop the movement of the driving belt. The spring which is adapted to thus operate said shifter and brake, when released, is normally restrained by a detent, on said bar, engaged with :an electric tripping device; so that when said electric tripping device is energized, said spring is released and the mechanism stopped as aforesaid.

My invention was designed for use in conjunction with viscose filament winding mechanism, of the character claimed in my copending application Serial No. 119,592 filed June 30, 1926 for Letters Patent of the United States for improvement in viscose filament takeup mechanism, to instantly stop the operation of a winding mechanism to prevent breakage ofa filament being wound when, from any cause, the rate of winding exceeds the rate atwhich the filament is being automatically ejected from the medium in which it has been coagulated. However, my invention maybe advantageously employed in any embodiment where it is desired 'to stop the movement of a driving belt as the consequence of closure of an electric circuit.

My invention includes the various novel .features of construction and arrangement hereiafter more definitely specified.

. In said drawings; Fig. I is a plan view of stop mechanism conveniently embodying my invention, with the parts in normal position in which power may be transmitted.

Fig. II is a vertical sectional viewof said mechanism, taken .on the line II, II in Fig. I. I

Fig, III is an elevation of the right hand end. of said mechanism, as shown in Figs. I and EV is a vertical sectional view of-tire electric tripping device shown in Fig. II, but

in the tripped position.

Fig. V is a diagram indicating an electric circuit including said tripping device and an electric switch which is normally open but which may be closed to operate the stop mechanism.

In said figures; the frame 1, which is conveniently a rectangular tube of cast iron open at top and bottom and having perforated lugs 2 by which it may be rigidly secured to any suitable support, has bearings 3 and 1 for the rotary shaft 5, Which is the power transmitting'shaft above contemplated. Said shaft is provided with collars '7 and 8 to prevent its axialmovement and car- :riesthe tight pulley 9 which is rigidly connected therewith, adjoining the loose pulley 10 which is free to turn thereon but prevented from axial movement by the collar 11. Said'shaft is normally arranged to be rotated by the belt 12 encircling said tight pulley 9 and said shaft is provided with the pulley 14, rigidly connected therewith, ,to drive the belt 15 leading to the filament .Wind ing mechanism or other mechanism which is to be stopped as above contemplated.

The slide bar 17 is mounted to reciprocate in said frame 1 parallel with said shaft 5 and has {the belt shifter 18 rigidly connected therewith by the set screw 19. Said belt shifter 18 has the notch; 20' in which said belt 12 is engaged to such an extent 'thatit may be shifted by longitudinal movement of said 'bar17, and said belt shifter 18 also carries the brake arm 22 which is-provided with the friction shoe 23, conveniently formed spring 25 isnormally compressed and restrained in the idle position shown, by 'the detent 28 Which is pivoted at 29-u-pon said bar so that it normally gravita-tes into the position shown'inFig. II, in which it is en ga'ged with the armature catch 31 of the electric mechanism which is mount in position to normally engage the notch'38 in the latch 39 which is pivoted at 40 in said casing 32. Said latch 39 is normally held in the position to uphold saidcatch 31, by

. its pin 37, by means of the armature 42 which then prevents said latch from swinging'to the left in F ig. II. Said armature is pivoted upon the shaft 43 in said casing 32 and is normally upheld in the position shown in Fig. II, by the spring 45 which is conveniently formed of a strip of sheet metal riveted at one end to said armature 12, and has its opposite end bearing upon the electromagnet 47.

As indicated in Fig. V,said electromagnet 47 is included in an electric circuit with the switch comprising the lever 48, and the source of electrical energy 19; such circuit including the conductor 50 leading to the fulcrum 51 of said switch 4 8,and the conductor 53 leading to the switch terminal 54. Said switch lever48 is provided with the spring 55 by which it is normally held in the open position shown in Fig. V. However, the arm 56 of said switch lever extends through the bight 57 of the filament 58, and the arrangement is such that when said switch lever arm 56 is upli ted by contraction. of said bight from the position shown in full lines to the position shown in dotted lines in Fig. V; saidcircuit including the electromagnet 17 and source of energy'4c9 is closed by contact of-said switch .lever 48 with said terminal 5 1. l/Vhe'n said 'electr magnett'Z is thus energized; itdraws do wnsaid armature 42, thus releasing said latch 39 so that the latter is freeto swing to the left in Fig. II, from the position shown in that figure to the position shown in Fig. IV,to thus release the pin 37 from. the notch 38 and permit the catch 31 tobe turned downwardly to the released position shown in Fig. IV; to thus release the detent 28 and permit the spring 25 to expand and thrust said slide bar 17 to the right in Figs. I and II, thus moving the belt shifter 13 from the position shown in full lines in Fig. I to the position shown in dotted lines in said figure, with the effect of shifting said belt 12 from the tight pulley 9 to the loose pulley 10 and simultaneously stopping the movement of said belt 15 by engagement. of the brake shoe23 with saidpulley 9..

It is to understood that when released as above described, said catch :31 is thrown down to the position. shown in Fig. IV by said detent 28 as the latter is thrust over it by said spring 25 from the position shown in Fig. II to the positionshown in Fig. IV

and against the stress of the spring 35 which continually tends to upturn said latch 31 to the initial position 'shownin Fig. II. Al-

though said spring 45 continually tends to uplift the armature 42 to the initial position shown in Fig. II said armature is not free to be thus uplifted-until said latch 39 is returned to the right, from the position shown in Fig. IV to the position shown in vFig- II, and such return movement of the latch 39 is effected by the pin 37 upon the catch 31 when it reaches said notch 38.-

.VVhen. said latch 39 is thus automatically returned to the right to the normal position shown in Fig. 11' in whichits lower end overhangs the right band edge of the. arma-' magnet 47. When said catch 31 is upturned to its normal position shown in full lines in Fig. II and in dotted lines in'Fig. IV; the parts may bexrestoredto their normal operative position 'by again withdrawing said slide bar 17 to the left, from the posi tion shown in Fig. IV to the position shown in Fi II. Such movement ma be effected by manually. thrusting said belt shifter 18, I

but is more conveniently effected by means of the flexible connector 60 which is attached to the screw '61 depending from'said bar is to be understood that various 'moditications may be made-thereinwithout departng from the essential features of my lnvention, as defined in the appended claims. i

I claim: 3

1.,In stop mechanism, the combination" with a frame having alined bearings; of a rotary power transmission shaft ,journaled in saidibeari-ngs andjhavlng twotight pulleys thereon, respectlvely for a motor driven belt and for a driving belt, and one loose pulley to which said driven belt maybe shifted; a slide bar mounted to reciprocate in saidzframe, parallel withsaid shaft, and carrying a belt shifter;-a springarranged to shift said barwhen released; whereby said driven belt may be transferred to said loose pulley; brake ;means on said, bar arranged tobe pressed against thegtight pulley from which the belt is shifted, .to stop the rotation thereof and thus stop the movement of said. driving belt, when said spring is released; an electric tripping device including a cas1ng,-,in said frame, containing an electromagnet, an armature for said magnet, a latch, arranged to be held in one extreme position by engagement with said armature, a catch, arranged to swing said latch to and from engagement with said armature, a spring arranged to normally upturn said catch in said casing; a detent, on said bar, arranged to engage said electric tripping device catch; so that when said electromagnet is energized, said detent and spring are released and said shaft stopped by shifting said belt and braking said pulley; and means arranged to energize said electromagnet, comprising a circuit including said electromagnet, a source of energy and a switch.

2. In stop mechanism, the combination with a frame; of a rotary power transmission shaft journaled in said frame'and having tight and loose pulleys thereon; a slide bar mounted to reciprocate in said frame, parallel with said shaft, and carrying a belt shifter; a spring, arranged to shift said bar when released; whereby a belt may be transferred from a tight pulley to said loose pulley; brake means on said bar arranged to be pressed against the tight pulley from which the belt is shifted, to stop the rotation of said shaft, whensaid spring is released; an electric tripping device including an electromagnet, an armature for said magnet, a

catch, and a spring arranged to normally upturn said catch; a detent, for said bar, arranged to normally engage said catch; so that when said electromagnet is energized, said detent and spring are released and the shaft stopped by shifting said belt and brak ing said pulley; and means arranged to energize said electromagnet, comprising a circuit including said electromagnet, a source of energy and a switch. 7

In stop mechanism, the combination with a frame; of a rotary power transmission shaft journ'aled in said frame and having tight and loose pulleys thereon; a slide bar.

mounted to reciprocate in said frame, and carrying abelt shifter; a spring, arranged to shift said bar when released; whereby a belt may be transferred from a tight pulley to a loose pulley; brake means on said bar arranged to be pressed against the tight pulley from which the beltiis shifted, to stop the rotation of said shaft, when said spring is released; an electric tripping device including an electromagnet, a catch, and a spring arranged to normally upturn said catch; a detent, for said bar, arranged to normally engage said catch; so that when said electromagnet is energized, said detent and spring are released and the shaft stopped by shifting said belt and braking said pulley; and means arranged to energized said electromagnet, comprising a circuit including said electromagnet, a source of energy and a switch.

4. In stop mechanism, the combination with a frame; of a rotary power transmission shaft journaled in said bearings andhaving two tight pulleys thereon, respectively for a motor driven belt and for a driving belt; a slide bar mounted to reciprocate in said frame; a spring, encircling said slide bar, arranged to shift said bar when released; a brake on said bar arranged tobe pressed against one of said tight pulleys to stop the rotation thereof and thus stop the movement of said driving belt, when said spring is released; an electric tripping device including a catch and an electromagnet arranged to release said catch; a detent for said bar, arranged to engage said catch; so that when said electromagnet is energized, said detent and spring are released and said shaft stopped by shifting said bar and braking said pulley; and means arranged to energize said electromagnet, comprising a circuit including said electromagnet, a source of energy and a switch.

5. In stop mechanism, the combination with a power transmission device including a rotary shaft having a tight pulley and a loose pulley thereon; a slide bar carrying a belt shifter and brake; a spring arranged to shift said bar when released; whereby a belt may be transferred from said ti ht pulley to said loose pulley; a detent f bar; a catch arranged to normally engage said detent; an electric tripping device, including an electromagnet, arranged to release said catch from said detent; a spring arranged to normally present said catch in operative position; and a circuit including said electromagnet, a source of energy, and a switch; whereby said stop mechanism may be operated by said switch.

6. The combination with a power transmission shaft; of a pulley rigidly connected with said shaft; a slide bar mounted to reciprocate parallel with said chaft and carrying a belt shifter and a brake; a spring arranged to press said bar to shift a belt from said pulley and apply said brake to said pulley; a detent, carried by said bar, on a horizontal'pivot,'and arranged to gravitate into operative position; a catch arranged to engage said detent and restrain said spring from operating; an electrically operative tripping device arranged to release said catch from said detent; and switch means arranged to operate said tripping device.

In testimony whereof, I have hereunto signed my name at Burlington, New Jersey, this 17th day of May, 1926.

SAMUEL A. NEIDICH.

or said I 

